[IA64] Increase max node count on SN platforms

Update configuration files with new CONFIG option.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/defconfig b/arch/ia64/defconfig
index 3e76728..6cba55d 100644
--- a/arch/ia64/defconfig
+++ b/arch/ia64/defconfig
@@ -116,6 +116,7 @@
 CONFIG_FORCE_MAX_ZONEORDER=17
 CONFIG_SMP=y
 CONFIG_NR_CPUS=512
+CONFIG_IA64_NR_NODES=256
 CONFIG_HOTPLUG_CPU=y
 # CONFIG_SCHED_SMT is not set
 # CONFIG_PREEMPT is not set